The primary objective is to evaluate the optimal endovascular therapy for SFA disease with strictly defined bail-out stent implantation. Under this bail out stent criteria, we will clarify what proportion of endovascular cases need bailout stent implantation

Basic objectives2

Safety,Efficacy

Basic objectives -Others

Trial characteristics_1

Confirmatory

Trial characteristics_2

Explanatory

Developmental phase

Phase IV

Assessment

Primary outcomes

Primary patency of optimal balloon and bail-out stent at 12months which was defined as freedom from restenosis by DUS at rest peak systolic velocity ratio (PSVR) less than 2.5 with no reintervention